Knowledge acquisition in different category and different granulation by scene

For common methods are unsuited for acquiring knowledge in thematic map designing,this article put forward the method of acquiring knowledge in different category and different granulation by scene. First,the concepts of scene,knowledge chain and granulation were defined. Second,the method was elaborated from nature and whole. At last,this method was proved that it could accord with the basic aim,acquire different category and different granulation knowledge effectively,and the structure of knowledge is high coherence,low coupling with easy maintenance and reuse.